Facebook not working via wifi

I have already read all the forums I could find on other people experiencing the same problem as me but those that were able to find solutions are still not able to fix my problem. So here is a breakdown of what my problem is and what I have already done:

- Facebook.com (and all related domains I.e. //https://www.facebook.com/messages/) is no longer accessible through my home wifi. This is on my iphone 4s, boyfriends LG Optimus, Dell Laptop and Macbook Pro Laptop.
- If we turn wifi off on our mobiles and switch to 3G then it is able to work
- When we try to access the page all that comes up is Google Chrome could not connect to www.facebook.com
- I have tried using Firefox, Safari and Internet Explorer and same problem
- I have reset my Netgear router to factory settings and after that changed wifi name and password
- I have firewall set to 'Off' (although when I went to do this it was already set to Off..... should I change it to Low? Tried changing it to Low and still no result)
- I have checked the Blocked Sites section of my router and no sites or keywords are being blocked
- I have reset the default settings in the Firewall section of my Control Panel on my Dell Laptop
- I have gone to this part as someone else said worked for them C:\Windows\System32\drivers\etc and looked up the hosts file but facebook nor any error messages seem to appear
- I have run ping and tracert and these are the results (don't know how to make sense of them though)

If anyone can shed some light please help! (Obviously it's only facebook but still quite annoying!)

I have already read all the forums I could find on other people experiencing the same problem as me but those that were able to find solutions are still not able to fix my problem. So here is a breakdown of what my problem is and what I have already done:

- Facebook.com (and all related domains I.e. //https://www.facebook.com/messages/) is no longer accessible through my home wifi. This is on my iphone 4s, boyfriends LG Optimus, Dell Laptop and Macbook Pro Laptop.
- If we turn wifi off on our mobiles and switch to 3G then it is able to work
- When we try to access the page all that comes up is Google Chrome could not connect to www.facebook.com
- I have tried using Firefox, Safari and Internet Explorer and same problem
- I have reset my Netgear router to factory settings and after that changed wifi name and password
- I have firewall set to 'Off' (although when I went to do this it was already set to Off..... should I change it to Low? Tried changing it to Low and still no result)
- I have checked the Blocked Sites section of my router and no sites or keywords are being blocked
- I have reset the default settings in the Firewall section of my Control Panel on my Dell Laptop
- I have gone to this part as someone else said worked for them C:\Windows\System32\drivers\etc and looked up the hosts file but facebook nor any error messages seem to appear
- I have run ping and tracert and these are the results (don't know how to make sense of them though)

If anyone can shed some light please help! (Obviously it's only facebook but still quite annoying!)

Thanks in advance.

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Both your links work for me using FF. You might try going to Tools>Options>Advanced Tab>Network Tab>Click the Settings button & make sure NO Proxy is clicked on. Good luck.